How to use the __callStatic function in php-PHP Problem-php.cn

How to use the __callStatic function in php

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Release： 2023-03-11 13:02:02

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This situation is especially common in larave, but during the development process it is obvious that some of these are not static. For example, if you use a model User, then every time you instantiate it, it will be a brand new one and will not affect each other. A magic method __callStatic is used here.

How to use the __callStatic function in php

For example:

<?php
class Test{
    public function __call($name, $arguments)
    {
        echo &#39;this is __call&#39;. PHP_EOL;
    }

    public static function __callStatic($name, $arguments)
    {
        echo &#39;this is __callStatic:&#39;. PHP_EOL;
    }
}

$test = new Test();
$test->hello();
$test::hi();
//this is __call:hello
//this is __callStatic:hi

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Of course, the magic method is also a very performance-intensive method. Every time it is called, scan the class first. It will be called only when a method is found, and this method can also be of great help for the neatness and abstraction of the code. There must be a trade-off between this.

The log class implemented below uses this A method, decouple the method, and you can call it as long as it meets the specified interface

<?php

class Test{
    //获取 logger 的实体
    private static $logger;

    public static function getLogger(){
        return self::$logger?: self::$logger = self::createLogger();
    }

    private static function createLogger(){
        return new Logger();
    }

    public static function setLogger(LoggerInterface $logger){
        self::$logger = $logger;
    }


    public function __call($name, $arguments)
    {
        call_user_func_array([self::getLogger(),$name],$arguments);
    }

    public static function __callStatic($name, $arguments)
    {
        forward_static_call_array([self::getLogger(),$name],$arguments);
    }
}

interface LoggerInterface{
    function info($message,array $content = []);
    function alert($messge,array $content = []);
}

class Logger implements LoggerInterface {
    function info($message, array $content = [])
    {
        echo &#39;this is Log method info&#39; . PHP_EOL;
        var_dump($content);
    }

    function alert($messge, array $content = [])
    {
        echo &#39;this is Log method alert: &#39;. $messge . PHP_EOL;
    }
}


Test::info(&#39;喊个口号:&#39;,[&#39;好好&#39;,&#39;学习&#39;,&#39;天天&#39;,&#39;向上&#39;]);
$test = new Test();
$test->alert(&#39;hello&#39;);

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Output:

this is Log method info
array(4) {
  [0]=>
  string(6) "好好"
  [1]=>
  string(6) "学习"
  [2]=>
  string(6) "天天"
  [3]=>
  string(6) "向上"
}
this is Log method alert: hello

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